Information

bbb_parport_adc

€26.00

The new bbb_parport cape.

General

This "cape" will enable you to interface a BBB (BeagleBone Black) with parallel port based NC systems. The cape provides bidirectional level shifting registers so that the BeagleBone’s 3.3V I/Os can be safely connected to regular parport based hardware (usually using 5V levels).

The basic cape provides 30+1 signals which can be used as inputs or outputs depending on the users needs. (30 IOs, 1 status LED).
Some of these are routed to the DB25 connector (compatible with LinuxCNC sample configurations, and common step/dir hardware), some are routed to the 6 axes connectors (check Schematics)

The sample signal names used can be used as is (using LinuxCNC sample configurations) or can be repurposed depending on user needs.

Overview

Schematics

The complete schematics are included with the product. Some parts are presented futher.

Parport pinout (IDC on the left, DB25 on the right):

Additional axes pinout:

Footnotes

The ADC version doesn't include an EEPROM. The EEPROM is not needed to run LinuxCNC, only for autodetecting the cape.
Using the sample configuration, the detection of the cape can be forced, so there is no issue in running LinuxCNC.